CN116507440A

CN116507440A - Soldering head assembly for an electric soldering device, in particular soldering iron, soldering device and soldering system

Info

Publication number: CN116507440A
Application number: CN202180077366.7A
Authority: CN
Inventors: 埃尔玛·穆勒; 彼得·齐默尔曼; 托尔斯滕·伊斯勒
Original assignee: Ersa GmbH
Current assignee: Ersa GmbH
Priority date: 2020-11-18
Filing date: 2021-11-09
Publication date: 2023-07-28
Also published as: JP2023547421A; MX2023005847A; ES2944951R1; US20240001471A1; WO2022106258A1; DE102020130464A1; JP7531061B2; DE102020130464B4; ES2944951A2

Abstract

The invention relates to a soldering head assembly (14) for an electric soldering device (10), in particular a soldering iron. The welding head assembly (14) is designed to be releasably disposed on a shank (12) of a welding device (10) having a heating element (18), and the welding head assembly (14) has a sleeve (22) with a welding head (24) disposed on a distal end of the sleeve (22). The sleeve (22) has an opening (60) at a proximal end for introducing the heating element (18), wherein a retaining element (26) is arranged at least partially annularly around the sleeve (22) and a spring element (38) is arranged between the retaining element (26) and the sleeve (22), said spring element (38) pushing the retaining element (26) in a distal direction. The invention is characterized in that the sleeve (22) has at least one stop means (44), which stop means (44) is arranged distally of the spring element (38) and secures the holding element (26) against the welding head assembly (14) in the distal direction.

Description

Soldering head assembly for an electric soldering device, in particular soldering iron, soldering device and soldering system

Technical Field

The invention relates to a soldering head assembly for an electric welding device, in particular for a soldering iron, wherein the soldering head assembly is designed to be releasably arranged on a soldering device shank with a heating element, wherein the soldering head assembly has a sleeve with a soldering head arranged on a distal end of the sleeve, wherein the sleeve has an opening at a proximal end for introducing the heating element, and wherein a holding element is arranged at least partially encircling the sleeve in an annular manner and a spring element is arranged between the holding element and the sleeve, which spring element urges the holding element in a distal direction.

Background

Such a soldering head assembly is known, for example, from the applicant's HIGH performance soldering iron i-TOOL HIGH POWER (model number 0240 CDJ).

In particular, the welding device may be held and guided by a person at the handle. By providing a heating element, the soldering tip is heated to melt the solder. Different geometries of the weld head are provided depending on the welding task. Thus, the weld head is releasably disposed on the shank. In particular, threaded connections, bayonet connections and locking systems are known.

Such an electric welding device is known from WO 2017/194261 A1, DE 20 2012 008 255 U1 or DE 10 2018 102 792B3.

EP 2 653 255 A1 discloses a releasably arranged welding head assembly for use on a heating element, the assembly having a sleeve with a welding head provided on a distal end of the sleeve. At the proximal end, the sleeve has an opening for introducing a heating element.

Disclosure of Invention

It is an object of the present invention to provide a welding head assembly, a welding device and a welding system which provide a high temperature resistant welding head which can be interchanged in a simple manner.

This object is achieved by an electric welding device having the features of claim 1. The sleeve thus has at least one stop means which is arranged distally of the spring element and which secures the holding element against the welding head assembly in the distal direction or the sleeve against the holding element in the proximal direction. The sleeve can thus be arranged on the holding element in a controlled manner, but nevertheless the sleeve can be displaced in the proximal direction against the force of the spring element. The weld head may be formed as a separate component or as a part and/or integral with the sleeve. Distal means away from the operator, and proximal means toward the operator.

In particular, when the welding head assembly is not arranged on the shank, the components arranged to be movable relative to each other are controllably arranged relative to each other. Two stop means, or three or more stop means, may be provided, in particular arranged equidistantly with respect to each other. The sleeve may have a recess, so that overheating of the sleeve and the retaining element arranged thereon is prevented, and so that material and weight are saved. At least one stop means may be provided in or adjacent to such a recess. The retaining element itself may have a conically tapering outer contour, for example, on which parallel knurls may be provided.

It is advantageous if at least one stop means protrudes beyond the sleeve in the radial direction. The portion protruding beyond the sleeve can then act on the retaining element for loss protection.

The at least one stop means is preferably integrally formed with the sleeve and is made as a hook-out tongue. Such a hooking tongue can be located in a recess of the sleeve, wherein the bending point is then provided on the tongue foot, and wherein the free end of the hooking tongue protruding in the proximal direction faces and acts on the holding element for loss protection.

Furthermore, it is advantageous if the holding element is integrally formed. This results in a compact and durable design.

Furthermore, the holding element may have a distal face for stopping the stopping tool and thus serving as a stopping limit for the sleeve. Thus no additional stopping tool is required. The end face may provide a radially inwardly directed shoulder which interacts with the stop means.

Furthermore, it is conceivable for the holding element to have a distal end face with a proximal inner face on which one end of the spring element is supported. This also results in a compact design, especially when the end face performs the following two functions: on the one hand, it can be used as a stop limit for the sleeve and, on the other hand, for supporting the spring element.

Another advantageous embodiment is: in the uninstalled state of the weld head assembly, the opening of the sleeve lies in the same plane as the proximal face of the retaining element or the opening of the sleeve protrudes beyond this plane in the proximal direction. The advantages are that: when the heating element is introduced into the opening of the sleeve, the heating element is not easily in contact with the holding element. When the heating element is introduced into the welding head assembly, it may exceed 100 ℃, which may lead to damage when it is formed of plastic material, in particular when it is in contact with the holding element.

Preferably, the spring element itself is designed as a helical spring surrounding the sleeve. The sleeve preferably has a flange portion at the proximal end, which surrounds the opening and protrudes in the radial direction, and against which one end of the spring element acts.

The holding element may have a contact portion which is opposite to the flange portion and against which the other end of the spring element acts. When the welding head assembly is not mounted on the handle, the holding element is thus urged in a distal direction against the at least one stop tool and is thus controllably fastened to the welding head assembly.

In order to guide the retaining element axially on the sleeve and to rotationally couple the retaining element to the sleeve, the sleeve may have a guide profile and the retaining element may have an opposite profile complementary thereto. In particular, the guide profile can be designed as a bead (bead) extending in the axial direction and protruding in the radial direction. The sleeve may be provided with a recess designed to be complementary to the bead. Preferably, a plurality of such guide contours are provided, which are arranged parallel to one another.

For functionally safe arrangement of the welding head assembly on the shank, the holding element has a recess on its proximal face, in particular the recess extends at least partially in the axial direction. The rear gripping portions are disposed between the recesses, these portions providing contact portions on a distal face thereof for abutment against opposing portions disposed on the handle. As a result, bayonet fastening of the weld head assembly to the shank may be achieved. First, the heating element is introduced into the welding head in the axial direction. During the introduction movement, the welding head is moved together with the sleeve by the heating element in the distal direction against the force of the spring element. The opposite portion travels in a distal direction past the rear clamping portion. When the spring element reaches a sufficient compression, the handle and the heating element may be rotated together about the longitudinal axis by a rotation angle such that the proximal face of the opposite portion interacts with the contact portion of the rear clamping portion. In the mounted position, the spring element then urges the free end of the heating element against the welding head and urges the counter portion against the contact portion of the rear clamping portion.

It is furthermore advantageous if a code, which can be read in particular by means of an optical reading device, is provided on the holding element in order to identify the welding head. In particular, the code is a two-dimensional code, for example, a two-dimensional code in the form of a bar code or a two-dimensional code (QR code). The code may also be designed as a radio frequency identification code (RFID code). For example, the coding may be provided on a radially recessed surface of the holding element and may be printed by pad printing (pad printing), for example. In particular when the holding element is made of a plastic material, a two-dimensional coding is particularly advantageous, since the plastic material does not change color even at higher temperatures. In particular, pad printing may employ white in order to optimize contrast with the plastic material used, which is preferably black or dark grey.

The advantage of setting such a code is that: the weld head being used may be tracked. For example, it is conceivable that the reading device is arranged on a storage table in which the welding head can be stored. After receiving the welding head, it can be guided past the reading device so that the welding head used can be stored. Furthermore, it is conceivable that after selecting an appropriate welding head, it can be checked whether the selected welding head is actually the desired welding head. However, the reading device may also be provided as a separate unit or on a welding station for providing the welding device with electrical energy.

By the arrangement of the recesses on the surface of the radial recesses, the coding is permanently protected against wear and further environmental influences. Overall, a permanent readability of the code is thereby ensured. Each type of bond head assembly is assigned a separate code such that the identity of the bond head assembly is unambiguous. The information detected by the reading means may be further processed by software. The read data may be structured and displayed in a form readable by a user. It is also conceivable to process the data by means of database software or a manufacturing execution system (MES, manufacturing execution system), in particular also for process monitoring. Thus, a particular welding head may be assigned to a particular welding task, and this may be known and inspected by the user.

The above object is also achieved by an electric welding device comprising a welding head assembly according to the invention and comprising a shank having a rod-shaped heating element at its distal end and a hand-held portion at its proximal end such that the distal end of the heating element can be introduced into the opening of the sleeve. As mentioned above, the welding head assembly according to the invention can advantageously be fastened to the shank in a functionally safe manner.

In particular, the shank may have a ribbed counter portion between the heating element and the hand-held portion, which interacts with the rear clamping portion such that in the mounted state the spring element causes the holding element to strike the counter portion and such that the free end of the heating element acts on the stop portion of the welding head. The proximal end of the weld head may be formed as a blind hole, with the contact portion then being formed by the bottom of the blind hole.

The above object is further achieved by a welding system comprising a welding device according to the invention with a welding head assembly according to the invention and a storage table for storing and removing the welding head assembly. The reading device for reading the code optionally provided on the holder element can be provided in or on the storage table.

Further details and advantageous embodiments of the invention can be found in the following description, on the basis of which exemplary embodiments of the invention are described and explained in more detail.

Drawings

In the drawings:

FIG. 1 illustrates a welding apparatus having a shank and a weld head assembly mounted thereon;

FIG. 2 shows the weld head assembly according to FIG. 1 released from the handle;

fig. 3 is an enlarged view of the incision III in fig. 2;

FIG. 4 shows the weld head assembly according to FIG. 2 in a view inclined from the rear;

FIG. 5 shows a longitudinal section through the weld head assembly according to FIG. 4;

FIG. 6 is a view of the retaining element of the weld head assembly tilted from behind;

FIG. 7 is a view of a retaining element of the weld head assembly tilted from the front;

FIG. 8 shows a cross section through a weld head assembly disposed on a shank;

FIG. 9 illustrates a storage station for a bond head assembly; and

fig. 10 shows a section through the storage table according to fig. 9 with a welding head assembly.

Detailed Description

Fig. 1 shows a soldering device 10 in the form of a soldering iron, the soldering device 10 comprising a handle 12 and a soldering tip assembly 14. At the proximal end of the handle 12, the handle 12 includes a hand-held portion 16 that is gripable by a user. As is apparent from fig. 2, the handle 12 further comprises a rod-shaped heating element 18, which rod-shaped heating element 18 has a free end 19 at its distal end, wherein the exchangeable weld head assembly 14 is finally heated with the heating element 18. As is clear from fig. 1, a connection cable 20 is provided on the side of the hand-held part 16 facing away from the heating element 18, via which connection cable 20 an electric current can be supplied to the welding device 10.

As best seen in fig. 2, 4, 5, 6, 7, 8, the weld head assembly 14 has a sleeve 22 with a weld head 24 secured to the distal end of the sleeve 22. The sleeve 22 may have a window-shaped recess 21. In the embodiment shown in the figures, the weld head 24 is designed as a part formed separately from the sleeve 22, but it is also conceivable that the weld head 24 is formed integrally with the sleeve 22.

The welding head assembly 14 is further provided with a retaining element 26, which retaining element 26 is arranged around the longitudinal axis 23 and surrounds the sleeve 22 in an annular manner and is designed to taper conically towards the welding head 24. The retaining element 26 has parallel knurls on its surface formed by knurl protrusions 27. The retaining element 26 is used to place the weld head assembly 14 on the handle 12 or to release it from the handle 12. Although the weld head 24 and sleeve 22 are made of a metallic material, the retaining element 26 is preferably made of a suitable plastic material.

As is apparent from the enlarged cut-out of fig. 3, the handle 12 has a ribbed counter portion 28 in the region between the heating element 18 and the hand-held portion 16. A total of four opposing portions 28 are provided, which are arranged opposite to each other. Each of the opposite portions 28 has a locking lug 30 extending in the axial direction on its proximal face.

As is clear from fig. 4 and 5, fig. 4 and 5 show a welding head assembly 14, the welding head assembly 14 having a welding head 24 deflected in a distal direction, the holding element 26 having four recesses 32 on its proximal side into which the counter parts 28 can be introduced in an axial direction. Between each two of the concave portions 32, a rear clamping portion 34 protruding inward in the radial direction is provided. On its distal face, the rear clamping portion 34 has a contact portion 36, which contact portion 36 serves to receive the counter portion 28 or its locking lug 30. The contact portions 36 are designed to be complementary to the latching lugs 30 such that they can rest on the contact portions 36 in a defined and secure manner.

As is apparent from the cross section of fig. 5, the welding head assembly 14 also has a spring element 38 alongside the welding head 24, the sleeve 22 and the retaining element 26. The spring element 38 is arranged between the sleeve 22 and the holding element 26 such that the spring element 38 pushes the holding element 26 away from the hand-held part 16 in the distal direction. The spring element 38 is designed as a spiral spring and surrounds the sleeve 22. At the proximal end of the sleeve 22, the sleeve has an opening 60 and a flange portion 40, the flange portion 40 protrudes in a radial direction, and the spring element 38 acts on the flange portion 40. Opposite the flange portion 40, the holding element 26 has a proximal inner face 42, which proximal inner face 42 faces the flange portion 40 and surrounds the sleeve 22, and the spring element 38 also acts on this proximal inner face 42. The spring element 38 is arranged and pretensioned such that it pushes the retaining element 26 on the sleeve 22 in distal direction, as described before.

In order to provide a controlled arrangement of the holding element 26, in particular of the integrally formed holding element 26, in particular of plastic material, on the sleeve 22, the sleeve has a stop means 44, which stop means 44 prevents the possibility of the sleeve 22 comprising the welding head 24 being removed from the holding element 26 in the proximal direction. As is apparent in particular from fig. 4 and 5, two opposing stop means 44 are provided which project beyond the sleeve 22 in the radial direction. The stop means 44 is integrally formed with the sleeve and is made as a hooking tongue. For this purpose, a bending point 46 is provided at the relevant tongue foot, along which bending point 46 the stop tool 44 is bent outwards in the radial direction. The free end 48 of the stop means 44 faces the holding element 26.

Fig. 6 and 7 show the welding head assembly 14, wherein the free end 48 of the stop tool 44 is here pressed against the distal end face 50 of the holding element 26 due to the spring force. The end face 50 of the retaining element 26 is provided with a radially inwardly projecting shoulder 52, the free end 54 of the shoulder 52 being used for axially guiding the sleeve. The free end 48 of the stop tool 44 rests on the distal upper face of the shoulder 52; thus, the end face 50 or the shoulder 52 forms a stop limit. As is also apparent from fig. 7, the sleeve 22 has a guide contour in the form of a bead 56 extending in the axial direction, which is visible in particular in fig. 5 and 7. Complementary to the bead 56, a radially extending recess 58 is provided at the free end 54 of the shoulder 52.

The advantages are that: the retaining element 26 cannot rotate relative to the sleeve 22 and thus prevents the weld head 24 from rotating. This is important, especially in connection with welding tasks, where the welding head must be kept at an angle. Another advantage is that: the free end 48 of the stop tool 44 is securely supported on the shoulder 52.

As is apparent in particular from fig. 5 and 6, in the uninstalled neutral state of the weld head assembly 14, the flange portion 40 rests with the opening 60 in the same plane as the proximal face 61 of the retaining element 26. The advantages are that: the holding element 26 is largely protected when the free end of the heating element 18 is introduced. It is also conceivable that the opening 60 protrudes with the flange portion 40 in the proximal direction beyond the holding element 26.

Fig. 8 shows the weld head assembly 14 mounted on the shank 12. To secure the weld head assembly 14 to the handle, the rear clamping portion 34 impacts the opposing portion 28 with the locking lug 30 in the distal direction by the spring force of the spring element 38.

The weld head assembly is mounted on the shank 12 as follows:

first, the free end 19 of the heating element 18 is introduced into the opening 60 of the sleeve 22. The heating element 18 is introduced into the sleeve 22 and then into the weld head 24 until the free end 19 of the heating element 18 acts on a stop 62 provided in the weld head 24. As is clear from fig. 5 and 8, the welding head 24 is formed as a blind hole and has a stop portion 62 at its bottom. Because the free end 19 of the heating element 18 acts on the stop portion 62, the weld head 24 is pushed in the distal direction against the force of the spring element 38 as the heating element 18 moves further in the distal direction. The holding element 26 is thus moved along the longitudinal axis 23 against the spring action relative to the welding head 24 or relative to the heating element 18. At the same time, the counter portion 28 enters into a recess 32 on the holding element 26. Thereafter, the holding element 26 is rotated relative to the heating element 24 about the longitudinal axis 23 such that the counter portion 28 or the lugs 30 thereof abut against the rear clamping portion 34. In the installed position, the locking lug 30 is then urged against the contact portion 36 due to the spring force of the spring element 38. Thus, the spring element 38 has the effect of: the free end 19 of the heating element is pushed to effect a functionally reliable heat conduction and, where appropriate, also a temperature measurement against the stop portion 62 of the weld head 24, and the opposite portion 28 with the locking lug 30 rests firmly in the contact portion 36 of the holding element 26.

As is clear from fig. 1, 2, 4, 6 and 7, a code 64 in the form of a two-dimensional code is provided on the holding element 26. The code 64 makes it readable with a reading device and can identify the welding head 24 or the welding head assembly 14 used in each case. The holding element 26 has a radially recessed surface 66 on its radial circumference, on which surface the coding 64 is arranged. Thus, the code 64 is reliably protected, in particular from damage or wear. The code may in particular be a bar code or a two-dimensional code printed with pad printing. It is also conceivable to provide an RFID chip or tag as the code.

Fig. 9 and 10 illustrate a storage station 80 for storing the welding apparatus 10 and for storing the various welding head assemblies 14. The storage table is designed to rest on a flat surface, in particular a table. The illustrated storage table 80 has a total of four funnel-shaped change holders 82, 84, 86 and 88 on its upper face, with the welding head assembly 14 being arranged in the change holders 82. Furthermore, a welding device holder 90 is provided in the central region 89, in which welding device holder 90 the welding device 10 can be stored. The change holders 82, 84, 86 and 88 are disposed laterally beside the welding device receiver 90. The storage table 80 also comprises, on its operator-facing side, a receiving compartment 92 for receiving small parts and accessory parts and a rack 93 for welding heads.

As is apparent in particular from fig. 10, the individual change holders 82, 84, 82, 88 are designed to taper conically in the distal direction about the insertion axis 94. The taper of the change holders 82, 84, 82, 88 is designed to be at least partially complementary to the taper of the holding element 26 such that the associated welding head assembly 14 is securely stopped in the change holders 82, 84, 86, 88 by its holding portion 26. The change holders 82, 84, 86, 88 have an introduction opening 96 on their proximal upper face and a bottom opening 98 on their distal bottom face. The lead-in opening 96 is elongated or oval and the bottom opening 98 is circular so that pivoting between the lead-in layer and the removal layer is possible. In general, the diameter of the lead-in opening 96 is greater than the diameter of the bottom opening 98, thereby creating a tapered design.

As is apparent in particular from the cross section of fig. 10, an anti-rotation element 100 in the form of a rib is provided on the inner surface of the change holders 82, 84, 86, 88 and lies in a plane extending through the introduction axis 94. It is conceivable that a rib or a plurality of ribs are provided in each case. The anti-rotation element 100 is formed to protrude toward the introduction axis 94 in the radial direction. The anti-rotation elements 100 are also designed such that they interact with parallel knurls provided on the associated retaining element 26 or engage between two knurled protrusions 27 to fix the retaining element 26 against rotation. However, it is also conceivable to arrange the anti-rotation element orthogonally with respect to the axis 94, for example on the surface of the introduction stop 106.

Accordingly, the welding head assembly 14 introduced into the change holders 82, 84, 86, and 88 is held in the storage table 80 so as not to rotate. By providing a total of four change holders 82, 84, 86, and 88 as shown in fig. 9, a total of four different weld head assemblies 14 may thus remain in the change holders 82, 84, 86, and 88 shown herein.

As is also apparent from the cross section of fig. 10, a retaining element 102 is provided in the region of the relevant introduction opening 96 for retaining the welding head assembly 14, which welding head assembly 14 is introduced into the respective change holders 82, 84, 86, 88 and pivots into the removal position during proximal removal of the handle 12. The associated retaining element 102 engages behind an annular shoulder 104 provided on the retaining element 26 in the removed position such that the retaining element 26 and thus the weld head assembly 14 are securely maintained in the storage station 80 when the handle is removed in the proximal direction. The holding element 102 is designed as a projection which is formed to project in the radial direction toward the introduction axis 94. To enable the weld head assembly 14 to move with the annular shoulder 104 below the retaining element 102, the change holders 82, 84, 86, 88 are formed in an elliptical shape over the lead-in opening. Thus, the weld head assembly may pivot or tilt from the lead-in axis 94 toward the removal axis 107. It is also conceivable that the retaining element 102 has a conditional elastic restoring capability. By maintaining the element 102, the weld head assembly 14 may be safely detached from the handle with the heating element, particularly if the weld head 24 may adhere to the heating element 18. However, if the weld head assembly 14 secured to the shank 12 were to be removed from the associated change holders 82-88, it could be done along the axis 94 without damaging the retaining element 26 and/or the retaining element 102.

As is further evident from the cross section of fig. 10, an introduction stop 106 is provided in the region of the bottom opening 98. The introduction stop 106 allows the distal face of the relevant holding element 26 to abut against the proximal upper face of the relevant introduction stop 106. This makes it possible to prevent the holding element 26 from getting stuck in the change holder.

The introduction stopper 106 is formed as a protrusion formed to protrude toward the introduction axis 94 in the radial direction. The design also allows the holding element 26 to pivot or tilt on the surface of the introduction stop 106 between the two axes 94 and 107. The relevant introduction stop 106 is designed here such that, when the holding element 26 is tilted between the axes 94 and 107, the anti-rotation element 100 engages with the parallel knurls 27 at any time and thus prevents the holding element from rotating during the entire tilting movement.

The two change holders 82 and 86 are designed to open at the edges and have a transverse opening 108 for the transverse introduction or removal of the weld head assembly 14. Accordingly, a weld head assembly 14 having a weld head and a size that is larger than the diameter of the bottom opening 98 may also be introduced into the change holders 82 and 86.

By providing the change holders 82 to 88 shown in fig. 9 and 10, the welding head assembly 14 can thus be replaced in a simple manner. The weld head assembly 14 disposed on the handle 12 is introduced into the change holder 82, 84, 86 or 88 along the axis 94 until the distal face of the holding element 26 abuts the proximal upper face of the introduction stop 106. Furthermore, at least one anti-rotation element 100 engages in a parallel knurling 27 provided on the retaining element 26, so that the retaining element 26 is arranged in a rotationally fixed manner in the associated change holder 82. Then, if the handle 12 is further actuated in the distal direction against the spring force of the spring element 34, the counter portion 28 or its locking lug 30 is disengaged from the contact portion 36. To release the bayonet-type fastening of the welding head assembly 14 on the handle 12, the handle 12 is rotated relative to the welding head assembly 14 until the handle-side opposing portion 28 enters the holding element-side recess 32, and the handle 12 together with the heating element 18 may be removed from the welding head assembly 14 in the proximal direction. Then, if the heating element 18 is to be adhered to the weld head 24, the shank 12 may be pivoted or tilted about the pivot point 99 from the axis 94 toward the axis 107 until the retaining element 102 engages behind the retaining element 26 or its annular shoulder 104, as shown in fig. 10. Thus, the associated retaining element 102 securely retains the weld head assembly 14 in the associated change holders 82-88 and prevents undesired removal from the associated change holders 82-88.

If a different weld head assembly 14 is to be secured to the shank 12, the heating element 18 may be introduced into the opening 60 of the sleeve 22 of the weld head assembly, which is stored on the storage table 80. The introduction must be carried out in such a way that the counter portion 28 provided on the shank 12 engages in a recess 32 provided on the holding element 26. After overcoming the spring force of the spring element 38, the handle 12 is rotated relative to the associated retaining element 26 such that the locking lugs 30 of the counter portion 28 engage with the contact portions 36 of the rear clamping portion 34 such that the weld head assembly 14 is secured to the handle 12 in a bayonet-type manner.

After the locking lugs 30 have abutted against the contact portions 36, the handle 12, along with the selected weld head assembly 14, may be guided out of the associated change holders 82-88 in the proximal direction. It is then guided out along axis 94.

The described modification of the weld head assembly 14 has the advantage that: this change can be made without manually touching the holding element 26 and thus without risk of burning on the holding element 26. Only the handle 12 of the welding device 100 is in the operator's hand; the bond head assembly 14 may be securely received in the corresponding change holders 82-88.

Furthermore, the reading device for reading the code 66 provided on the associated welding head 14 may be arranged in the storage table 80 or on the storage table 80. After the bond head assembly 14 has been altered, the associated retaining element 26 with the code 64 may be guided through a reading device so that the associated bond head assembly 14 or the associated bond head 24 may be identified. In an alternative embodiment, a reading device for the RFID chip or tag is mounted in the storage station to provide information about the bond head in direct use when the bond head assembly 14 is received or altered.

Claims

1. A soldering device (10) for an electric soldering device, in particular a soldering head assembly (14) for a soldering iron, the soldering head assembly (14) being designed to be releasably arranged on a shank (12) of the soldering device (10) with a heating element (18),

the weld head assembly (14) has a sleeve (22) extending about a longitudinal axis and has a weld head (24) disposed on a distal end of the sleeve (22),

the sleeve (22) has an opening (60) at a proximal end for introducing the heating element (18), and

the welding head assembly (14) has a holding element (26) and a spring element (38), the holding element (26) at least partially surrounding the sleeve (22) in an annular manner, the spring element (38) being arranged between the holding element (26) and the sleeve (22) and pushing the protective element (26) in a distal direction, characterized in that the sleeve (22) has at least one stop means (44), the stop means (44) being arranged distally of the spring element (38), the stop means securing the holding element (26) against the welding head assembly (14) in a distal direction.

2. The weld head assembly (14) of claim 1, wherein the at least one stop tool (44) protrudes beyond the sleeve (22) in a radial direction.

3. The welding head assembly (14) according to claim 1 or 2, characterized in that the at least one stop tool (44) is designed as a hooking tongue which is integrally formed with the sleeve (22).

4. A welding head assembly (14) according to claim 1, 2 or 3, characterized in that the retaining element (26) is integrally formed.

5. The weld head assembly (14) according to any one of the preceding claims, wherein the retaining element (26) has a distal face (50), the distal face (50) being used to stop the stop tool (44) and thus serve as a stop limit for the sleeve (22).

6. The weld head assembly (14) according to any one of the preceding claims, wherein the retaining element (26) has a distal face (50), the distal face (50) having a proximal inner face (42), one end of the spring element (38) being supported on the proximal inner face (42).

7. The weld head assembly (14) according to any one of the preceding claims, wherein the opening (60) of the sleeve (22) is in the same plane as a proximal face of the retaining element (26) or the opening (60) of the sleeve (22) protrudes beyond the plane in a proximal direction.

8. The welding head assembly (14) according to any of the preceding claims, wherein the spring element (38) is designed as a coil spring surrounding the sleeve (22), and wherein the sleeve (22) has a flange portion (40), the flange portion (40) protruding in a radial direction at a proximal end, and one end of the spring element (38) acts on the flange portion (40).

9. The welding head assembly (14) of any of the preceding claims, wherein to axially guide the retaining element (26), the sleeve (22) has at least one guide profile (56), and wherein the retaining element (26) has at least one counter profile (58) of complementary design to the at least one guide profile (56).

10. The welding head assembly (14) according to any of the preceding claims, wherein the welding head assembly is fastened to the handle by a bayonet fastening such that the handle is rotatable relative to the welding head assembly and removable relative to a proximal direction for releasing the welding head assembly.

11. The welding head assembly (14) according to any of the preceding claims, wherein the holding element (26) has recesses (32) on its proximal face and a rear clamping portion (34) between the recesses (32), the rear clamping portion (34) being provided on its distal face with a contact portion (36) for abutment against an opposite portion (28) provided on the shank (12).

12. The welding head assembly (14) according to any of the preceding claims, characterized in that a code (64) readable by a reading device is provided on the holding element (26) for identifying the welding head assembly (14).

13. The bond head assembly (14) of claim 12, wherein the retaining member (26) has a radially recessed surface (66), the code (64) being disposed on the surface (66).

14. An electric soldering device (10), in particular a soldering iron, comprising a soldering head assembly (14) according to any of the preceding claims, and comprising a handle (12), the handle (12) having a rod-shaped heating element (18) at its distal end and a hand-held portion (16) at its proximal end, such that the distal end (19) of the heating element (18) can be introduced into the opening (60) of the sleeve (22).

15. The welding device (10) according to claim 14, wherein the shank portion (12) between the heating element (18) and the hand-held portion (16) has an opposite portion (28) that interacts with the rear clamping portion (34) such that in the mounted state the spring element (38) causes the holding element (26) to strike the opposite portion (28) such that the free end (19) of the heating element (18) is urged against a stop portion (62) of the welding head (24).

16. A welding system comprising a welding device (10) according to claim 14 or 15, and a storage station (80) for storing and removing the welding head assembly (14) from the shank (12).

17. Welding system according to claim 16, characterized in that the storage table (80) has at least one change holder (82, 84, 86, 88), the change holder (82, 84, 86, 88) being designed at least partially complementary to the holding element (26) such that a welding head assembly (24) arranged on the shank (12) can be introduced into the change holder (82, 84, 86, 88) along an axis (94), and the change holder (82, 84, 86, 88) has an anti-rotation element (100) interacting with the holding element (26).